The Episode 4 - Closure Add-on for The Lions Song: Episode 1 - Silence has 23 achievements.
Look into all compartments
Try to acquire beer as Otto
Distract Wilma
Try to convince the policeman that you saw the error in your ways
Sweet-talk Frieda into telling you her name
Keep ordering wine
Check all of Theo's scientific notes
Check in on Rauch
Listen in on Nikic and Wurm
Unlock all connections in the gallery
Use the "decide again" feature
Finish Episode 4
Finish all achievements in Episode 4
Finish All Episodes
Finish all achievements in The Lion's Song